Module development and code questions

I am new to Drupal and I am already in love: created a whole portal in 3 days.
Here is my question: I am trying to set up a rating system by 4 different criteria: is there a module that can do that?
I need this for Flexinode content type.
Thanks in advance for the answer!

I'm writing a custom module for a "conference" node type. It's incredibly complex (multiple tables involved, etc). So I have a local task to edit the schedule for the conference. Each scheduled event can have up to 16 file attachments. I have built my form with:

    $form['schedule'] = array('#tree' => TRUE);

...and inside this tree I have...

Can I have books into a group? If not;

I would like suggest a moddule to create Books Into a Group (OG)

So

Organic Group can have your own books.
Subscriber of this group can write "Book pages" only to "Book 1 of Group"
Could have a Selection List to choose which book (of group) the subscriber would like to write "Book 1 of Group", "Book 2 of Group" etc..

Best Regards

Mario

Hi All. Happy Halloween!

Im currently working on a module and cant get the settings from the block configuration to save. Perhaps you can take a look at my code, and point to what I might be doing wrong. After clicking on save in the bock configuration, the row is created in the variables table like it should be, however the value for the row is being set to N;

http://www.codedemons.net/pb/?show=6898

I've looked at other module's block configuration code, and don't see any difference.

i have 2 selectbox's in the first selectbox there is a list of country's from db.
When i select a country i want the second selectbox to fill with city's.

So i want a onchange action on the first selectbox. When a selection is made, i want function city() to be called to fill en visualize the second selectbox.

Hi,

I use Drupal form API, I would like to put an image into a form to display a preview of a file input value.
Is there a way to insert a picture into a form?

Regards.